Disease is spread more quickly between individuals who live in close proximity, such as in a nesting colony of penguins. disease can be considered a(n):
a. density-dependent factor
b. factor that increases carrying capacity
c. density-independent factor
d. factor that causes greater birth rate than death rate
e. exponential growth factor

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.